In my previous question here, I had a problem with showing GeoGraphics in a CDF document, but thanks to other users, I was able to solve it. But the code I wrote to test my work gave an error. I tried ...

I'm trying to make a Manipulate command to plot the contour lines of a function of two variables $f(x,y)$. I think I should use the "InputField" option somehow, and I thought of something like this:
...

I am trying to use Manipulate to create a function which allows a user to play with a probability density. The following generates a static density over the range 2000 - 4000, then allows the user to ...

I am trying to build a package that will display a sector of an ellipse where the angle is taken from a focus of the ellipse rather than from the center. The code seems to work fine when called with ...

I have cobbled together two Wolfram Demonstration files to produce the code below. My objective is to generate the phase plane plot on the left side of the output by clicking in one of the regions of ...

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